Question

Which of the following shows the correct process of solving −30+4.5
?(1 point)
Responses

−30+4.5=−3⋅0+4.5=0+4.5=4.5
negative 3 superscript 0 baseline plus 4.5 equals negative 3 times 0 plus 4.5 equals 0 plus 4.5 equals 4.5

−30+4.5=−1⋅30+4.5=−1⋅1+4.5=−1+4.5=3.5
negative 3 superscript 0 baseline plus 4.5 equals negative 1 times 3 superscript 0 baseline plus 4.5 equals negative 1 dot 1 plus 4.5 equals negative 1 plus 4.5 equals 3.5

−30+4.5=(−3)0+4.5=1+4.5=5.5
negative 3 superscript 0 baseline plus 4.5 equals left parenthesis negative 3 right parenthesis superscript 0 baseline plus 4.5 equals 1 plus 4.5 equals 5.5

−30+4.5=−3+4.5=1.5

Answer 1

It depends on what the expression actually is.

- If the expression is -3^0 + 4.5, the correct choice is the second one: 3^0 = 1, so -3^0 = -1 and -1 + 4.5 = 3.5.
- If the expression really is -30 + 4.5, none of the choices are correct; the correct result is -25.5.